Bill Bruford: Journeyman jazz drummer who started with Yes in 1969, got bored, moved to King Crimson, played live with Genesis after the Crims broke up, joined the supergroup UK in 1977, and joined the new iteration of the Crims in 1981.

Keith Emerson: Keyboard player/Moog synthesizer innovator who co-founded the Nice in 1967. He left that band in 1970 to form the progressive rock colossus Emerson Lake & Palmer, which broke up in 1978.

Robert Fripp: Founding guitarist and songwriter behind King Crimson, who assigned that band name to rotating teams of musicians. Collaborated with Brian Eno on ambient music, starting in 1973, and worked with Eno and David Bowie in the late 1970s.

Peter Hamill: Founder and lead singer/songwriter of Van der Graaf Generator, which has existed on and off since 1969.

Lee Jackson: Bass player and vocalist for the Nice until its 1970 break-up.

March 3 2015 1:39 PMThe “Most Pleasurable Portrayal of Libertarianism“ Bonus SegmentDavid, Emily, and John discuss what Parks and Recreation got right about government.Emily Bazelon, David Plotz, and John Dickerson